With six people already confirmed dead, rescue crews in a northern Texas town continued their search for victims Friday after a wave of 16 tornadoes crashed through the region, ripping homes to pieces and laying waste to large swaths of the area.

In Granbury, seven people were still missing after an EF4 tornado packing winds up to 200 mph destroyed a neighborhood late Wednesday, the National Weather Service said.

Hood County Sheriff Roger Deeds told reporters that the search for victims had to be expanded because "two of these people that they found were not even near their homes, so we're going to have to search the area out there."

Nearly 100 damaged homes remained off limits Thursday night as crews in the hardest-hit areas continued to a search for survivors and victims.

Hundreds of people had checked in with authorities to say they had survived.

The tornado that devastated Granbury, Texas, had winds up to 200 miles an hour and killed at least six people. It was one of 12 tornadoes that hit North Texas Wednesday night. NBC's Gabe Gutierrez reports.

The violent twisters flattened homes, uprooted trees, tossed trailers onto cars and left hundreds homeless in morth Texas. About 100 people were injured.

All of the dead – confirmed to all be adults — were from the Rancho Brazos neighborhood on the outskirts of Granbury where most of the homes were built in the past five years by residents themselves and the Christian charity group Habitat for Humanity. Granbury is a town of 8,000 people about 65 miles southwest of Dallas.

Officials on Thursday night released the names of the dead: Jose Tovas Alvarez, 34, Robert Whitehead, 60, Tommy Martin, 61, Marjari Davis, 82, Leo Stefanski, 83, and Glenda White, whose age wasn't known. The identities of the missing were not made public.

“We’re going to keep on looking, we’re not going to give up until every piece of debris is turned over and we know that we’re good to go” Deeds said at a news briefing Thursday evening.

It was the first EF-4 in the Dallas-Ft. Worth area since 1994, National Weather Service spokesman Mark Fox said.

The tornadoes seemed to have caused less damage in Cleburne, where Mayor Scott Cain told KXAS. The town did “have the potential for some injuries,” Cain said.

Some witnesses have said the tornado that swept through Johnson County may have been as much as a mile wide. While that twister that hit Granbury was smaller, but it struck a more populated area, according to Fox.

People in the affected areas had a little more than the national average of 13 minutes warning before the tornadoes struck, according to the National Weather Service.

“The warning came well before the tornadoes,” Fox said. Residents of Montague County were alerted about 15 to 30 minutes before the storm struck, and in Hood County a warning was issued 25 minutes before the tornado touched down.